Time-Frequency Distribution of Heart Rate Variability Below 0.05hz by Wigner-Ville Spectral Analysis in Congestive Heart Failure Patients

Abstract: The Wigner-Ville spectral analysis was utilized to demonstrate a high-resolution time-frequency distribution of heart rate variability below 0.05 Hz. There are different time-frequency characteristics between the normal subject and the patient with severe congestive heart failure. The former consists of multiple and broad-band spectral peaks, while the latter presents unique spectral peaks. Based on Bayes theory, a classifier for the unique spectral peaks was developed. After the beneficial improvement with low-dose beta0blocker, the unique spectral peaks had disappeared or the time of occurrence was reduced in most patients.